Just deserts for his efforts as chief of the fascist party Nasjonal Samling to aid the Nazi conquest of his home country. Quisling interrupted a radio broadcast on April 9, 1940 to proclaim himself Prime Minister* and order cooperation with invading Germans.

Although Quisling’s lack of popular support compromised his value even as a puppet, he remained as Minister President of Norway through the war — a crucial tool in Germany’s counter-encirclement jousting with Britain, nicely explained at the outset of Frank Capra’s American propaganda flick Why We Fight:

He enjoyed public regard commensurate with his station.

A 1944 cartoon in Sweden (which remained tenuously neutral and unoccupied during the war) indicates that Quisling had already made his name a byword for treachery. The caption reads:
“I am Quisling.”
“And the name?”